.container{
    width: 100%;
    height: calc(100% - 50px);
    display: flex;
    align-items: center;
    justify-content: center;

}
#screen {
    width: 400px;
    height: 200px;
    font-size: 20px;
    background-color: rgba(255, 255, 255, 0.5); /* 最后一个值 0.5 表示 50% 透明度 */;
    text-align: center;
    line-height: 2.5;
    color: black;
    border-radius: 20px;

    margin-bottom: 5px;
}
#match-button {
    width: 400px;
    height: 50px;
    line-height: 50px;
    font-size: 20px;
    color:white;
    background-color: orange;
    border: none;
    outline: none;
    border-radius: 10px;
}
#match-button:active {
    background-color: gray;
}
